Title
The intramandibular joint in squamates, and the phylogenetic relationships of the fossil snake Pachyrhachis problematicus Haas
Title Variants
Alternative:
Fieldiana: Geology, new series, no. 43
Alternative:
Intramandibular joint in squamates
Related Titles
Series:
Fieldiana, Geology, new ser., no. 43
Series:
Publication (Field Museum of Natural History), 1507
By
Rieppel, Olivier
Zaher, Hussam
, joint author
Type
Book
Material
Published material
Publication info
Chicago, Ill, Field Museum of Natural History, 2000
Notes
"Accepted July 28, 1999. Published March 31, 2000."
A review of the morphology of the lower jaw in varanoid squamates, including mosasaurs, and basal snakes (scolecophidians, anilioids, basal macrostomatans) reveals a greater degree of variability in the differentiation of the intramandibular joint than had previously been recorded. In particular, the mandibular joint of mosasauroid squamates and snakes differs fundamentally. In mosasaurs, the dentary is primarily suspended from the prearticular and the posteriorly concave splenial receives the anteriorly convex angular. In snakes, the dentary is primarily suspended from the surangular portion of the compound bone, and the angular is the receiving part in the mobile contact with the splenial. Characters of the intramandibular joint, along with those resulting from a review of the cranial anatomy of the fossil snake Pachyrhachis from the basal Upper Cretaceous of Ein Jabrud, are used in a review of squamate interrelationships. The results corroborate macrostomatan affinities of Pachyrhachis and do not support the hypothesis that snakes originated from mosasauroids, a clade of marine varanoid squamates from the Cretaceous.
Fieldiana series has been published as Geological Series by Field Columbian Museum (1895-1909) and Field Museum of Natural History (1909-1943), and as Fieldiana: Geology by Chicago Natural History Museum (1945-1966) and Field Museum of Natural History (1966-).
Subjects
Evolution
,
Morphology
,
Pachyrhachis problematicus
,
Phylogeny
,
Snakes
,
Squamata
Call Number
QE1 .F4 n.s., no. 43
Language
English
Identifiers
DOI:
https://doi.org/10.5962/bhl.title.3584
OCLC:
43889906
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